EP0915240B1 - Leakage testing of gas turbine fuel manifolds - Google Patents
Leakage testing of gas turbine fuel manifolds Download PDFInfo
- Publication number
- EP0915240B1 EP0915240B1 EP97810846A EP97810846A EP0915240B1 EP 0915240 B1 EP0915240 B1 EP 0915240B1 EP 97810846 A EP97810846 A EP 97810846A EP 97810846 A EP97810846 A EP 97810846A EP 0915240 B1 EP0915240 B1 EP 0915240B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distribution system
- fuel
- water
- leak
- tightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 107
- 238000012360 testing method Methods 0.000 title claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 3
- 230000003287 optical effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 22
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000001294 propane Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/222—Fuel flow conduits, e.g. manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/18—Detecting fluid leaks
Definitions
- the present invention relates to the field of Gas turbines. It relates to a method for checking the tightness a fuel distribution system of a gas turbine with Multi-burner system, which fuel distribution system is fuel via a fuel supply line to a plurality of burners distributed.
- It also relates to a device for carrying out the Method comprising a gas turbine with a multi-burner system, a fuel distribution system, which fuel distribution system Fuel through a fuel supply line to the distributed to individual burners, as well as a water distribution system, which water via a water supply line for spraying on the Burner distributed.
- the fuel e.g. naphtha
- the fuel is over a complex Fuel distribution system to a plurality (for example 18) Fuel lances carried.
- the fuel lines the fuel distribution system are off Can be separated in several places for ease of installation or through commercially available (detachable) connecting elements connected with each other.
- the task is in a method of the aforementioned Art solved in that the fuel distribution system in the switched off Condition of the gas turbine with a pressurized one liquid and non-flammable auxiliary medium becomes.
- a liquid auxiliary medium creates Test conditions that reflect the operating conditions of the distribution system are similar when using liquid fuels.
- a liquid immediately if a leak occurs strong pressure drop which on the one hand can be evaluated well can and on the other hand against a pressurized Gas is only a minor security risk. In particular is a water leak in the overall system very easy to locate.
- a first preferred embodiment of the method according to the Invention is characterized in that the fuel lines of the fuel distribution system for reasons of ease of installation designed to be separable at several points and that the leak test after every assembly action on the separable fuel lines before the next one Start of the gas turbine is carried out. In this way new leakages can occur due to assembly work on the system, immediately and reliably at any time identified and corrected.
- a second preferred embodiment of the invention is characterized in that as an auxiliary medium water is used to check the tightness that next the fuel distribution system in the gas turbine, a water distribution system which water is present via a water supply distributed to the burner for injection, and that for Check the tightness of the water distribution system with the one to be checked Fuel distribution system for the duration of the test process is connected.
- Water as an auxiliary medium is cheap, harmless, easy to use and does not pose any environmental problems on.
- the test facility is particularly simple if according to a preferred development of this embodiment for the water distribution system means, especially in the form of a Water pump, for generating the for injection into the Burners necessary water pressure are available, and if the funds are used to test the Tightness of the fuel distribution system necessary water pressure to create.
- This allows special pressure generating devices for the leak test system.
- the inventive device of the type mentioned for carrying out the method is characterized in that that the water distribution system with the fuel distribution system is connected via a leak test line, in which at least a shut-off device is arranged. This will result in minimal Effort to implement a leak test system, which in a simple manner and with extensive use existing system parts a fast and efficient and possibly automated testing of the fuel distribution system allows.
- a preferred embodiment of the device according to the invention is characterized in that in the water supply a quick-closing valve and a main control valve in series are arranged, and that the leak test line behind the two valves, the fuel supply line with the Water supply line connects. This way the two Valves for leak testing of the fuel distribution system can also be used.
- the wiring diagram is an exemplary embodiment of a fuel and water distribution system for a gas turbine reproduced with multi-burner system, with which one Check for leaks in the fuel distribution system according to the Invention can be carried out in a simple manner.
- the Multi-burner system comprises a number of 18 fuel lances L1, .., L18, of which only the first for the sake of simplicity and last three L1, .., L3 and L16, .., L18 are shown. each the fuel lances L1, .., L18 are used to inject fuel (Oil, naphtha or similar) in a corresponding burner, in which are called the necessary for driving the gas turbine Gases are generated.
- the Fuel lances L1, .., L18 additional water in the burner be injected, for example, the temperature in the To lower the combustion chamber and thus the emission of NOx reduce.
- the pilot burner 31 for igniting the system, the via a check valve 30 from a propane gas block 29 is supplied with propane gas.
- each fuel lance L1, .., L18 has its own branch line (28 for fuel lance L18) to the fuel feed line 11 connected and via one in the branch line 28 arranged single switching valve (26 for fuel lance L18) separable from the fuel distribution system 10.
- the water is also centralized by a water pump 36 fed through a water supply line 12 and through a water distribution system 35 on the individual fuel lances L1, .., L18 or burner distributed. Every fuel lance is for this L1, .., L18 via a separate branch line (27 for fuel lance L18) connected to the water supply line 12 and via an individual switching valve arranged in the branch line 27 (25 for fuel lance L18) from the water distribution system 35 separable. Behind the two single switching valves 25, 26 is a check valve (24 for fuel lance L18) between branch lines 27, 28 inserted.
- a quick-closing valve 19 and a main control valve 13 are arranged in series in the fuel supply line 11.
- the quick-closing valve 19 is closed if the fuel supply is to be interrupted quickly in the event of a fault.
- With the main control valve 13, the fuel supply to the burners can be controlled during operation.
- Fuel remaining in the fuel distribution system 10 can be drained off via an automatic drainage valve 17 that branches off from the fuel supply line 11 between the quick-closing valve 19 and the main control valve 13.
- a quick-closing valve 20, a main control valve 14 and an automatic drainage valve 18 are used in the water supply line 12 with the same functions with regard to the water.
- a further manual drainage valve 21 is arranged on the fuel distribution system 10, which is opened when the fuel distribution system 10 is flushed with N 2 via a manual flushing valve 23.
- a leak test line runs behind the main control valves 13, 14 32 between the fuel supply line 11 and the Water supply line 12.
- shut-off valves 33, 34 are one behind the other several shut-off devices (shut-off valves) 33, 34 arranged, by means of which the leakage test line 32 in normal operation the system can be safely interrupted.
- shut-off valves shut-off valves
- the connection through the Leakage test line 32 is used to check the tightness of the Fuel distribution system 10.
- the connection via the ball valve 22 also serves to flush the fuel distribution system 10 Water, the rinsing water via a bypass line 15 Valve 16 is brought past the valves 14 and 20.
- the invention is simple and safe Possibility of dangerous leaks in the fuel distribution system to track down and fix a gas turbine at an early stage, causing additional downtime and dangerous Operating states of the system can be avoided.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Description
Die vorliegende Erfindung bezieht sich auf das Gebiet der Gasturbinen. Sie betrifft ein Verfahren zum Prüfen der Dichtheit eines Brennstoffverteilsystems einer Gasturbine mit Mehrbrennersystem, welches Brennstoffverteilsystem Brennstoff über eine Brennstoffzuleitung auf eine Mehrzahl von Brennern verteilt.The present invention relates to the field of Gas turbines. It relates to a method for checking the tightness a fuel distribution system of a gas turbine with Multi-burner system, which fuel distribution system is fuel via a fuel supply line to a plurality of burners distributed.
Sie betrifft weiterhin eine Vorrichtung zur Durchführung des Verfahrens, umfassend eine Gasturbine mit einem Mehrbrennersystem, einem Brennstoffverteilsystem, welches Brennstoffverteilsystem Brennstoff über eine Brennstoffzuleitung auf die einzelnen Brennern verteilt, sowie ein Wasserverteilsystem, welches Wasser über ein Wasserzuleitung zum Eindüsen auf die Brenner verteilt. It also relates to a device for carrying out the Method comprising a gas turbine with a multi-burner system, a fuel distribution system, which fuel distribution system Fuel through a fuel supply line to the distributed to individual burners, as well as a water distribution system, which water via a water supply line for spraying on the Burner distributed.
In modernen Gasturbinen, welche mit emissionsarmen Mehrbrennersystemen ausgerüstet sind - wie dies zum Beispiel bei der von der Anmelderin angebotenen Gasturbine vom Typ GT8C der Fall ist - wird der Brennstoff (z.B. Naphtha) über ein komplexes Brennstoffverteilsystem zu einer Mehrzahl (von beispielsweise 18) Brennstofflanzen befördert. Die Brennstoffleitungen des Brennstoffverteilsystems sind dabei aus Gründen der Montagefreundlichkeit an mehreren Stellen auftrennbar bzw. durch handelsübliche (lösbare) Verbindungselemente miteinander verbunden.In modern gas turbines, which have low-emission multi-burner systems are equipped - such as the GT8C type gas turbine offered by the applicant Case is - the fuel (e.g. naphtha) is over a complex Fuel distribution system to a plurality (for example 18) Fuel lances carried. The fuel lines the fuel distribution system are off Can be separated in several places for ease of installation or through commercially available (detachable) connecting elements connected with each other.
Diese Trennstellen bzw. Verbindungselemente erweisen sich in der Praxis als typische Stellen für Brennstoffleckagen. Um den Schutz der Gasturbine sicherzustellen, wird der das Brennstoffverteilsystem umgebende Raum mit Brennstoffschnüfflern überwacht. Wird durch die Brennstoffschnüffler während des Betriebes der Gasturbine das Ueberschreiten einer vorgegebenen Grenzkonzentration festgestellt, wird die Brennstoffzufuhr unterbrochen und die Gasturbine abgestellt.These separation points or connecting elements are shown in in practice as typical locations for fuel leaks. Around To ensure the protection of the gas turbine, the will Fuel distribution system surrounding space with fuel sniffers supervised. Is through the fuel sniffer exceeding one during operation of the gas turbine predetermined limit concentration is determined, the fuel supply interrupted and the gas turbine turned off.
Besonders nach Montagearbeiten am Brennstoffverteilsystem oder an den Brennern, die meist ein zeitweises Auftrennen der Brennstoffleitungen erfordern, kommt es im Brennstoffverteilsystem vermehrt zu Leckagen, welche erst im Betrieb erkannt werden und dann ein Gefahrenpotential darstellen. Muss die Gasturbine dann abgeschaltet werden, verringert sich insgesamt die Verfügbarkeit der Anlage. Zugleich stellen derartige Betriebsunterbrechungen unnötige Belastungszyklen für die Gesamtanlage dar. Especially after assembly work on the fuel distribution system or on the burners, which are usually a temporary disconnection of the Require fuel lines, it happens in the fuel distribution system increasingly leads to leaks, which are only recognized during operation and then represent a potential hazard. Must be that Gas turbine are then shut down, overall decreases the availability of the facility. At the same time, such Business interruptions unnecessary load cycles for the entire system represents.
Es ist daher Aufgabe der Erfindung, ein Verfahren zum Prüfen der Dichtheit eines Brennstoffverteilsystems sowie eine Vorrichtung zur Durchführung des Verfahrens zu schaffen, welche die Wahrscheinlichkeit von während des Betriebes auftretenden Leckagen deutlich reduzieren und die damit verbundenen Nachteile beseitigen.It is therefore an object of the invention to provide a method for testing the tightness of a fuel distribution system and a device to carry out the procedure to create which the likelihood of occurring during operation Significantly reduce leakages and the associated disadvantages remove.
Die Aufgabe wird bei einem Verfahren der eingangs genannten Art dadurch gelöst, dass das Brennstoffverteilsystem im abgeschalteten Zustand der Gasturbine mit einem unter Druck stehenden flüssigen und nicht brennbaren Hilfsmedium abgedrückt wird. Durch das Abdrücken mit einem ungefährlichen Hilfsmedium vor dem Betriebsbeginn können Leckagen im Verteilsystem auf einfache und sichere Weise frühzeitig erkannt und behoben werden. Die Verwendung eines flüssigen Hilfsmediums schafft Prüfbedingungen, die den Betriebsbedingungen des Verteilsystems bei Einsatz von flüssigen Brennstoffen ähnlich sind. Darüber hinaus ergibt sich wegen der geringen Kompressibilität einer Flüssigkeit beim Auftreten einer Leckage sofort ein starker Druckabfall, der einerseits gut ausgewertet werden kann und andererseits gegenüber einem unter Druck stehenden Gas nur ein geringes Sicherheitsrisiko darstellt. Insbesondere ist eine Wasserleckage im Gesamtsystem sehr gut zu lokalisieren.The task is in a method of the aforementioned Art solved in that the fuel distribution system in the switched off Condition of the gas turbine with a pressurized one liquid and non-flammable auxiliary medium becomes. By pressing with a harmless auxiliary medium Before the start of operation, there may be leaks in the distribution system recognized and remedied early and easily become. The use of a liquid auxiliary medium creates Test conditions that reflect the operating conditions of the distribution system are similar when using liquid fuels. In addition, because of the low compressibility a liquid immediately if a leak occurs strong pressure drop, which on the one hand can be evaluated well can and on the other hand against a pressurized Gas is only a minor security risk. In particular is a water leak in the overall system very easy to locate.
Eine erste bevorzugte Ausführungsform des Verfahrens nach der Erfindung zeichnet sich dadurch aus, dass die Brennstoffleitungen des Brennstoffverteilsystems aus Gründen der Montagefreundlichkeit an mehreren Stellen auftrennbar ausgebildet sind, und dass die Prüfung auf Dichtheit nach jeder Montageaktion an den auftrennbaren Brennstoffleitungen vor dem nächsten Start der Gasturbine durchgeführt wird. Auf diese Weise können neu auftretende Leckagen, die aufgrund von Montagearbeiten am System entstanden sind, jederzeit sofort und zuverlässig identifiziert und behoben werden.A first preferred embodiment of the method according to the Invention is characterized in that the fuel lines of the fuel distribution system for reasons of ease of installation designed to be separable at several points and that the leak test after every assembly action on the separable fuel lines before the next one Start of the gas turbine is carried out. In this way new leakages can occur due to assembly work on the system, immediately and reliably at any time identified and corrected.
Eine zweite bevorzugte Ausführungsform des erfindungsgemässen Verfahrens ist dadurch gekennzeichnet, dass als Hilfsmedium zum Prüfen der Dichtheit Wasser verwendet wird, dass neben dem Brennstoffverteilsystem in der Gasturbine ein Wasserverteilsystem vorhanden ist, welches Wasser über ein Wasserzuleitung zum Eindüsen auf die Brenner verteilt, und dass zum Prüfen der Dichtheit das Wasserverteilsystem mit dem zu prüfenden Brennstoffverteilsystem für die Dauer des Prüfvorgangs verbunden wird. Wasser als Hilfsmedium ist billig, ungefährlich, einfach zu handhaben, und wirft keinerlei Umweltprobleme auf. Durch die Verwendung des vorhanden Wasserverteilsystems für die Prüfung der Dichtheit des Brennstoffverteilsystems lässt sich mit geringem Zusatzaufwand ein Leckagetestsystem aufbauen, das zudem auch bei bereits vorhandenen Gasturbinenanlagen auf einfache Weise nachgerüstet werden kann.A second preferred embodiment of the invention The method is characterized in that as an auxiliary medium water is used to check the tightness that next the fuel distribution system in the gas turbine, a water distribution system which water is present via a water supply distributed to the burner for injection, and that for Check the tightness of the water distribution system with the one to be checked Fuel distribution system for the duration of the test process is connected. Water as an auxiliary medium is cheap, harmless, easy to use and does not pose any environmental problems on. By using the existing water distribution system for testing the tightness of the fuel distribution system a leak test system can be set up with little additional effort build up that also with existing ones Gas turbine systems can be easily retrofitted can.
Besonders einfach gestaltet sich die Testeinrichtung, wenn gemäss einer bevorzugten Weiterbildung dieser Ausführungsform für das Wasserverteilsystem Mittel, insbesondere in Form einer Wasserpumpe, zum Erzeugen des für die Eindüsung in den Brennern notwendigen Wasserdrucks vorhanden sind, und wenn die Mittel verwendet werden, um den für die Prüfung der Dichtheit des Brennstoffverteilsystems notwendigen Wasserdruck zu erzeugen. Hierdurch kann auf spezielle Druckerzeugungseinrichtungen für das Leckagetestsystem verzichtet werden. Die erfindungsgemässe Vorrichtung der eingangs genannten Art zur Durchführung des Verfahrens ist dadurch gekennzeichnet, dass das Wasserverteilsystem mit dem Brennstoffverteilsystem über eine Leckagetestleitung verbunden ist, in welcher wenigstens ein Absperrorgan angeordnet ist. Hierdurch wird mit minimalem Aufwand ein System zur Prüfung der Dichtheit verwirklicht, welches auf einfache Weise und unter weitgehender Ausnutzung vorhandener Anlagenteile eine schnelle und effiziente und ggf. automatisierbare Prüfung des Brennstoffverteilsystems ermöglicht.The test facility is particularly simple if according to a preferred development of this embodiment for the water distribution system means, especially in the form of a Water pump, for generating the for injection into the Burners necessary water pressure are available, and if the funds are used to test the Tightness of the fuel distribution system necessary water pressure to create. This allows special pressure generating devices for the leak test system. The inventive device of the type mentioned for carrying out the method is characterized in that that the water distribution system with the fuel distribution system is connected via a leak test line, in which at least a shut-off device is arranged. This will result in minimal Effort to implement a leak test system, which in a simple manner and with extensive use existing system parts a fast and efficient and possibly automated testing of the fuel distribution system allows.
Eine bevorzugte Ausführungsform der erfindungsgemässen Vorrichtung ist dadurch gekennzeichnet, dass in der Wasserzuleitung hintereinander ein Schnellschlussventil und ein Hauptregelventil angeordnet sind, und dass die Leckagetestleitung hinter den beiden Ventilen die Brennstoffzuleitung mit der Wasserzuleitung verbindet. Auf diese Weise können die beiden Ventile für die Leckageprüfung des Brennstoffverteilsystems mit eingesetzt werden.A preferred embodiment of the device according to the invention is characterized in that in the water supply a quick-closing valve and a main control valve in series are arranged, and that the leak test line behind the two valves, the fuel supply line with the Water supply line connects. This way the two Valves for leak testing of the fuel distribution system can also be used.
Weitere Ausführungsformen ergeben sich aus den abhängigen Ansprüchen.Further embodiments result from the dependent claims.
Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im Zusammenhang mit der Zeichnung näher erläutert werden. Die einzige Figur zeigt in einem Leitungsschema ein bevorzugtes Ausführungsbeispiel für eine erfindungsgemässe Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.The invention is intended to be described in the following using exemplary embodiments be explained in more detail in connection with the drawing. The only figure shows a preferred one in a wiring diagram Embodiment for a device according to the invention to carry out the method according to the invention.
In der Figur ist als Ausführungsbeispiel das Leitungsschema
eines Brennstoff- und Wasserverteilsystems für eine Gasturbine
mit Mehrbrennersystem wiedergegeben, mit welchem eine
Prüfung auf Dichtheit des Brennstoffverteilsystems gemäss der
Erfindung auf einfache Weise durchgeführt werden kann. Das
Mehrbrennersystem umfasst eine Anzahl von 18 Brennstofflanzen
L1,..,L18, von denen der Einfachheit halber nur die ersten
und letzten drei L1,..,L3 bzw. L16,..,L18 gezeigt sind. Jede
der Brennstofflanzen L1,..,L18 dient zur Eindüsung von Brennstoff
(Oel, Naphta o.ä.) in einen entsprechenden Brenner, in
welchem die für den Antrieb der Gasturbine notwendigen heissen
Gase erzeugt werden. Neben dem Brennstoff kann durch die
Brennstofflanzen L1,..,L18 zusätzlich Wasser in den Brenner
eingedüst werden, um beispielsweise die Temperatur in der
Brennkammer zu erniedrigen und damit den Ausstoss von NOx zu
verringern. Zusätzlich zu den Brennern bzw. Brennstofflanzen
L1,..,L18 ist zum Zünden der Anlage ein Zündbrenner 31 vorhanden,
der über ein Rückschlagventil 30 aus einem Propangasblock
29 mit Propangas versorgt wird.In the figure, the wiring diagram is an exemplary embodiment
of a fuel and water distribution system for a gas turbine
reproduced with multi-burner system, with which one
Check for leaks in the fuel distribution system according to the
Invention can be carried out in a simple manner. The
Multi-burner system comprises a number of 18 fuel lances
L1, .., L18, of which only the first for the sake of simplicity
and last three L1, .., L3 and L16, .., L18 are shown. each
the fuel lances L1, .., L18 are used to inject fuel
(Oil, naphtha or similar) in a corresponding burner, in
which are called the necessary for driving the gas turbine
Gases are generated. In addition to the fuel, the
Fuel lances L1, .., L18 additional water in the burner
be injected, for example, the temperature in the
To lower the combustion chamber and thus the emission of NOx
reduce. In addition to the burners or fuel lances
L1, .., L18 there is a
Der Brennstoff wird zentral durch eine Brennstoffzuleitung 11
zugeführt und durch ein Brennstoffverteilsystem 10 auf die
einzelnen Brennstofflanzen L1,..,L18 bzw. Brenner verteilt.
Dazu ist jede Brennstofflanze L1,..,L18 über eine eigene Abzweigleitung
(28 für Brennstofflanze L18) an die Brennstoffzuleitung
11 angeschlossen und über ein in der Abzweigleitung
28 angeordnetes Einzelschaltventil (26 für Brennstofflanze
L18) von dem Brennstoffverteilsystem 10 abtrennbar.The fuel is fed centrally through a
Das Wasser wird ebenfalls zentral von einer Wasserpumpe 36
durch eine Wasserzuleitung 12 zugeführt und durch ein Wasserverteilsystem
35 auf die einzelnen Brennstofflanzen L1,..,L18
bzw. Brenner verteilt. Dazu ist jede Brennstofflanze
L1,..,L18 über eine eigene Abzweigleitung (27 für Brennstofflanze
L18) an die Wasserzuleitung 12 angeschlossen und
über ein in der Abzweigleitung 27 angeordnetes Einzelschaltventil
(25 für Brennstofflanze L18) von dem Wasserverteilsystem
35 abtrennbar. Hinter den beiden Einzelschaltventilen
25, 26 ist in jeder Brennstofflanze ein Rückschlagventil (24
für Brennstofflanze L18) zwischen den Abzweigleitungen 27, 28
eingefügt.The water is also centralized by a
In der Brennstoffzuleitung 11 sind hintereinander ein
Schnellschlussventil 19 und ein Hauptregelventil 13 angeordnet.
Das Schnellschlussventil 19 wird geschlossen, wenn bei
einer Störung die Brennstoffzufuhr schnell unterbrochen werden
soll. Mit dem Hauptregelventil 13 kann die Brennstoffzufuhr
zu den Brennern während des Betriebes geregelt werden.
Ueber ein zwischen Schnellschlussventil 19 und Hauptregelventil
13 von der Brennstoffzuleitung 11 abzweigendes automatisches
Drainageventil 17 kann im Brennstoffverteilsystem 10
verbleibender Brennstoff abgelassen werden. Mit den gleichen
Funktionen bezüglich des Wassers sind in der Wasserzuleitung
12 ein Schnellschlussventil 20, ein Hauptregelventil 14 und
eine automatisches Drainageventil 18 eingesetzt. Zusätzlich
ist am Brennstoffverteilsystem 10 noch ein weiteres manuelles
Drainageventil 21 angeordnet, welches geöffnet wird, wenn das
Brennstoffverteilsystem 10 über ein manuelles Spülventil 23
mit N2 gespült wird.A quick-
Das Brennstoffverteilsystem 10 und das Wasserverteilsystem 35
sind nun auf zwei Arten untereinander verbunden: Einerseits
verläuft hinter den Hauptregelventilen 13, 14 eine Leckagetestleitung
32 zwischen der Brennstoffzuleitung 11 und der
Wasserzuleitung 12. In dieser Leckagetestleitung 32 sind hintereinander
mehrere Absperrorgane (Absperrventile) 33, 34 angeordnet,
mittels derer die Leckagetestleitung 32 im Normalbetrieb
der Anlage sicher unterbrochen werden kann. Andererseits
sind die beiden Systeme über einen automatisierten Kugelhahn
22 miteinander verbindbar. Die Verbindung über die
Leckagetestleitung 32 dient zur Prüfung der Dichtheit des
Brennstoffverteilsystems 10. Die Verbindung über den Kugelhahn
22 dient zum Spülen des Brennstoffverteilsystems 10 mit
Wasser, wobei das Spülwasser über eine Bypassleitung 15 mit
Ventil 16 an den Ventilen 14 und 20 vorbei herangeführt wird.The
Zum Leckagetest werden bei ansonsten geschlossenen Brennstoffarmaturen
bzw. Ventilen zunächst die Absperrventile 33,
34 in der Leckagetestleitung 32 geöffnet. Gleichzeitig werden
das Schnellschlussventil 20 und das Hauptregelventil 14 in
der Wasserzuleitung 12 geöffnet. Dann wird die Wasserpumpe 36
gestartet. dadurch füllt sich über die Leckagetestleitung 32
das Brennstoffverteilsystem 10 mit Wasser bis zu einem Druck,
der vorzugsweise dem maximal zu erwartenden Brennstoffdruck
entspricht. Alle Undichtigkeiten im Brennstoffverteilsystem
11 können nun ohne Gefahr dadurch erkannt und analysiert werden,
dass durch optische Kontrolle (Fersehkamera, Inaugenscheinnahme
etc.) Leckagen lokalisiert werden, und/oder dass
das System bei Erreichen des Solldruckes abgeschlossen und
der zeitliche Verlauf des Wasserdruckes im System z.B. mittels
eines (oder mehrerer) angeschlossenen Druckaufnehmer(s)
37 überwacht und gemessen wird. Sobald die Leckagen entdeckt
und lokalisiert sind, können sie behoben werden. Nach dem Abschluss
des Tests und vor dem eigentlichen Start der Gasturbine
werden das Wasserverteilsystem 35 und das Brennstoffverteilsystem
10 schliesslich wieder in ihren Ausgangszustand
zurückgeführt. Der ganze Leckagetest kann bei der in der Figur
dargestellten Anlagenkonfiguration im übrigen halbautomatisiert
durchgeführt werden. Leakage tests are carried out on otherwise closed fuel valves
or valves first the shut-off
Insgesamt ergibt sich mit der Erfindung eine einfache und sichere Möglichkeit, gefährliche Leckagen im Brennstoffverteilsystem einer Gasturbine frühzeitig aufzuspüren und zu beheben, wodurch zusätzliche Stillstandszeiten und gefährliche Betriebszustände der Anlage vermieden werden.Overall, the invention is simple and safe Possibility of dangerous leaks in the fuel distribution system to track down and fix a gas turbine at an early stage, causing additional downtime and dangerous Operating states of the system can be avoided.
- 1010
- Brennstoffverteilsystemfuel distribution
- 1111
- Brennstoffzuleitungfuel supply line
- 1212
- Wasserzuleitungwater supply
- 1313
- Hauptregelventil (Brennstoff)Main control valve (fuel)
- 1414
- Hauptregelventil (Wasser)Main control valve (water)
- 1515
- Bypassleitungbypass line
- 1616
- Ventil (Bypassleitung)Valve (bypass line)
- 1717
- autom. Drainageventil (Brennstoff)Autom. Drainage valve (fuel)
- 1818
- autom. Drainageventil (Wasser)Autom. Drainage valve (water)
- 1919
- Schnellschlussventil (Brennstoff)Quick-closing valve (fuel)
- 2020
- Schnellschlussventil (Wasser)Quick-closing valve (water)
- 2121
- man. Drainageventilone. drainage valve
- 2222
- autom. KugelhahnAutom. ball valve
- 2323
- man. Spülventilone. flush valve
- 2424
- Rückschlagventil (Brennstofflanze)Check valve (fuel lance)
- 25,2625.26
- Einzelschaltventil (Brennstofflanze)Single switching valve (fuel lance)
- 2727
- Abzweigleitung (Brennstoff)Branch line (fuel)
- 2828
- Abzweigleitung (Wasser)Branch line (water)
- 2929
- Propangasblockpropane gas block
- 3030
- Rückschlagventilcheck valve
- 3131
- Zündbrennerpilot burner
- 3232
- LeckagetestleitungLeakage test line
- 33,3433.34
- Absperrventilshut-off valve
- 3535
- WasserverteilsystemWater Distribution System
- 3636
- Wasserpumpewater pump
- 3737
- Druckaufnehmer Pressure transducer
- L1,..,L18L1, .., L18
- Brennstofflanzefuel lance
Claims (12)
- Method of testing the leak-tightness of a fuel distribution system (10) of a gas turbine with multiburner system, which fuel distribution system (10) distributes fuel by means of a fuel supply line (11) to a plurality of burners (L1, .., L18), characterized in that, in the switched-off condition of the gas turbine, the fuel distribution system (10) is hydraulically tested with a liquid, and incombustible, auxiliary medium under pressure.
- Method according to Claim 1, characterized in that the fuel lines (11, 27) of the fuel distribution system (10) are, for reasons of ease of assembly, configured so that they can be separated at a plurality of locations, and in that the testing for leak-tightness is carried out after each assembly operation on the separable fuel lines (11, 27) before the next start of the gas turbine.
- Method according to one of Claims 1 and 2, characterized in that water is used as the auxiliary. medium for testing the leak-tightness.
- Method according to Claim 3, characterized in that in addition to the fuel distribution system (10), a water distribution system (35) is present in the gas turbine, which water distribution system (35) distributes water by means of a water supply line (12) for injection to the burners (L1, .., L18), and in that in order to test the leak-tightness, the water distribution system (35) is connected, for the duration of the test procedure, to the fuel distribution system (10) to be tested.
- Method according to Claim 4, characterized in that the water distribution system (35) is connected to the fuel distribution system (10) by means of a leak test line (32) in which at least one shut-off element (33, 34) is arranged, and in that, in order to test the leak-tightness, the at least one shut-off element (33, 34) is opened for the duration of the test procedure.
- Method according to one of Claims 4 and 5, characterized in that, for the water distribution system (35), means, in particular in the form of a water pump (36), are provided for the generation of the water pressure necessary for the injection into the burners (L1, .., L18), and in that the means (30) are employed in order to generate, the water pressure necessary for the testing of the leak-tightness of the fuel distribution system (10).
- Method according to one of Claims 1 to 6, characterized in that, to test the leak-tightness, the fuel distribution system (10) is hydraulically tested with a pressure which corresponds to the maximum fuel pressure to be expected during operation.
- Method according to one of Claims 1 to 7, characterized in that the testing of the leak-tightness of the fuel distribution system (10) takes place by means of an optical inspection for the appearance of the auxiliary medium, or water, from the system.
- Method according to one of Claims 1 to 7, characterized in that the testing of the leak-tightness of the fuel distribution system (10) takes place by means of an inspection for the pressure present in the system, which has been closed off.
- Appliance for carrying out the method according to one of Claims 1 to 9, comprising a gas turbine with a multiburner system, a fuel distribution system (10), which fuel distribution system (10) distributes fuel by means of a fuel supply line (11) to the individual burners (L1, .., L18), together with a water distribution system (35), which distributes water by means of a water supply line (12) for injection to the burners (L1, .., L18), characterized in that the water distribution system (35) is connected to the fuel distribution system (10) by means of a leak test line (32), in which at least one shut-off element (33, 34) is arranged.
- Appliance according to Claim 10, characterized in that a quick-action valve (20) and a main control valve (14) are respectively arranged one behind the other in the water supply line (12), and in that the leak test line (32) connects the fuel supply line (11) to the water supply line (12) after the two valves (14, 20).
- Appliance according to one of Claims 10 and 11, characterized in that a plurality of shut-off elements (33, 34) are, for safety reasons, arranged one behind the other in the leak test line (32).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59709514T DE59709514D1 (en) | 1997-11-10 | 1997-11-10 | Method for testing the tightness of a gas turbine fuel distribution system |
| EP97810846A EP0915240B1 (en) | 1997-11-10 | 1997-11-10 | Leakage testing of gas turbine fuel manifolds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97810846A EP0915240B1 (en) | 1997-11-10 | 1997-11-10 | Leakage testing of gas turbine fuel manifolds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0915240A1 EP0915240A1 (en) | 1999-05-12 |
| EP0915240B1 true EP0915240B1 (en) | 2003-03-12 |
Family
ID=8230462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97810846A Expired - Lifetime EP0915240B1 (en) | 1997-11-10 | 1997-11-10 | Leakage testing of gas turbine fuel manifolds |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0915240B1 (en) |
| DE (1) | DE59709514D1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10002084C2 (en) * | 2000-01-19 | 2001-11-08 | Siemens Ag | Gas and steam turbine plant |
| ITMI20101372A1 (en) * | 2010-07-26 | 2012-01-27 | Ansaldo Energia Spa | METHOD AND EQUIPMENT TO DETECT LIQUID FUEL LEAKS IN A COMBUSTION GROUP OF A GAS TURBINE SYSTEM |
| CH705182A1 (en) * | 2011-06-17 | 2012-12-31 | Alstom Technology Ltd | A method for operating a fuel supply for a heat engine. |
| US9239008B2 (en) * | 2012-10-16 | 2016-01-19 | General Electric Company | Turbine leak detection system |
| IT201700073686A1 (en) * | 2017-06-30 | 2018-12-30 | Nuovo Pignone Tecnologie Srl | METHOD AND SYSTEM FOR THE SAFE START OF GAS TURBINES |
| EP3460438B1 (en) * | 2017-09-26 | 2021-02-17 | General Electric Company | Gas turbomachine leak detection system and method |
| FR3089254B1 (en) * | 2018-11-30 | 2021-11-12 | Ge Energy Products France Snc | DRAINAGE CIRCUIT OF A COMBUSTION CHAMBER AND PROCESS FOR DETERMINING THE FAILURE OF SUCH A CIRCUIT |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185462A (en) * | 1978-04-05 | 1980-01-29 | General Electric Company | Fluid fitting for turbofan engines |
| US4197733A (en) * | 1979-03-28 | 1980-04-15 | Holland Richard W | Pressure test apparatus |
| US4422675A (en) * | 1981-07-29 | 1983-12-27 | United Technologies Corporation | Co-axial tube coupling |
| GB2129541A (en) * | 1982-10-29 | 1984-05-16 | Rolls Royce | Gas turbine engine fuel manifold/burner assembly |
| US5307620A (en) * | 1991-04-09 | 1994-05-03 | Kawasaki Jukogyo Kabushiki Kaisha | Fuel gas burning control method |
| US5259185A (en) * | 1992-06-05 | 1993-11-09 | General Electric Company | Fuel drainage connector system for aircraft gas turbine |
| US5263314A (en) * | 1992-09-28 | 1993-11-23 | General Motors Corporation | Fuel leakage protection system for gas turbine engine |
| DE4335412B4 (en) * | 1993-10-18 | 2005-01-27 | Alstom | Process and device for fuel distribution for annular combustion chambers of gas turbine plants |
| DE19513158A1 (en) * | 1995-04-07 | 1996-10-10 | Bosch Gmbh Robert | Device for detecting a leak in a fuel supply system |
-
1997
- 1997-11-10 EP EP97810846A patent/EP0915240B1/en not_active Expired - Lifetime
- 1997-11-10 DE DE59709514T patent/DE59709514D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0915240A1 (en) | 1999-05-12 |
| DE59709514D1 (en) | 2003-04-17 |
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